Finding Java and Identifying Vendors

15 Jan Finding Java and Identifying Vendors

Overview

This is a quick post that was discussed at the January 2020 MacAdmin meeting in reference to Oracle Java licensing.

• Finding Java on your Mac Systems
  One option to find Java usage on a macOS system is to use the “find” command. The find command in UNIX is a command-line utility for walking a file hierarchy. It can be used to find files and directories and perform subsequent operations on them. It supports searching by file, folder, name, creation date, modification date, owner, and permissions. By using the ‘-exec’ other UNIX commands can be executed on files or folders found.
  
  Generic Syntax

  find [where to start searching from] [expression determines what to find] [-options] [what to find]

  To scan your Mac client systems to discover Java and applications bundling Java (i.e. JRE, JDK, etc.) with the application.

  find / -name "java" -type f -exec ls -s {} \; -exec {} -version \; -exec echo "" \;
  

• Example Applications that Bundle Java
  
  Adobe Animate CC 2018
  Adobe CC/Adobe Animate CC 2018/Adobe Animate CC 2018.app/Contents/jre/jre1.8.0_121.jre/Contents/Home/bin/java
  java version “1.8.0_121”
  Java(TM) SE Runtime Environment (build 1.8.0_121-b13)
  Java HotSpot(TM) 64-Bit Server VM (build 25.121-b13, mixed mode)

  Mathematica
  Mathematica.app/Contents/SystemFiles/Java/MacOSX-x86-64/bin/java
  java version “1.8.0_161”
  Java(TM) SE Runtime Environment (build 1.8.0_161-b12)
  Java HotSpot(TM) 64-Bit Server VM (build 25.161-b12, mixed mode)

  MATLAB_R2019aMATLAB_R2019a.app/sys/java/jre/maci64/jre/bin/java
  java version “1.8.0_181”
  Java(TM) SE Runtime Environment (build 1.8.0_181-b13)
  Java HotSpot(TM) 64-Bit Server VM (build 25.181-b13, mixed mode)SPSS
  SPSS/jre/bin/java
  java version “1.8.0_51”
  Java(TM) SE Runtime Environment (build 1.8.0_51-b16)
  Java HotSpot(TM) 64-Bit Server VM (build 25.51-b03, mixed mode)

  Stata
  Stata/utilities/java/macosx-x64/jre1.8.0_31/bin/java
  java version “1.8.0_31”
  Java(TM) SE Runtime Environment (build 1.8.0_31-b13)
  Java HotSpot(TM) 64-Bit Server VM (build 25.31-b07, mixed mode)

• Identifying Vendors of Installed Java
  You can find the Java vendor by using the following script posted by Rich Trouton or if you are using Jamf Pro you can create an extension attribute to actively find the Java vendor installed on your managed Mac client systems.

  #!/bin/bash
  
  jdk_installed=$(/usr/libexec/java_home 2>/dev/null)
  result=None
  
  if [[ -n "$jdk_installed" ]]; then
  
     # If an installed JDK is detected, check to see if it's from a known vendor.
  
     javaJDKVendor=$(defaults read "${jdk_installed%/*}/Info" CFBundleIdentifier | grep -Eo "adoptopenjdk|amazon|apple|azul|openjdk|oracle|sap" | head -1)
     
     if [[ "$javaJDKVendor" = "adoptopenjdk" ]]; then
          result="AdoptOpenJDK"
     elif [[ "$javaJDKVendor" = "amazon" ]]; then
          result="Amazon"
     elif [[ "$javaJDKVendor" = "apple" ]]; then
          result="Apple"
     elif [[ "$javaJDKVendor" = "azul" ]]; then
          result="Azul"
     elif [[ "$javaJDKVendor" = "openjdk" ]]; then
          result="OpenJDK"
     elif [[ "$javaJDKVendor" = "oracle" ]]; then
          result="Oracle"
     elif [[ "$javaJDKVendor" = "sap" ]]; then
          result="SAP"
     else
          result="Unknown"
     fi   
  fi
  
  echo "<result>$result</result>"
  
  exit 0

Note, I have given this information to our campus central group (UIT) about the applications that are bundling Java with their application, and they have reached out to our campus software licensing group (Office of Software Licensing) about contacting the software vendors about their licensing or plan on migrating to non-Oracle Java, etc. But, currently, I haven’t received any official feedback from these campus groups.